After modifying the case to accommodate the longer cell pack and assembling the case the laptop did not start up at first.
The image above doesn’t show but I later added thick pieces of paper below the nickel strips to avoid further shorts.Īs you imagined the story doesn’t end here. I accidentally damaged the pink protection layer on one of the cells with my soldering iron and shorted the two poles… biiig spark ensues. In fact you shouldn’t do this at home at all.
Before soldering I charged all 6 cells one-by-one to 4.20V. I re-used the original spot-welded nickel strips and soldered them back using phosphoric acid surface wetter (75% H3PO4 / 25% H2O the cell’s stainless steel cover requires special wetting for solder to properly melt on it).
